CN104878780A - Timed desilting silt prevention system and method during flattening of immersed tunnel foundation bed - Google Patents
Timed desilting silt prevention system and method during flattening of immersed tunnel foundation bed Download PDFInfo
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- CN104878780A CN104878780A CN201510283226.1A CN201510283226A CN104878780A CN 104878780 A CN104878780 A CN 104878780A CN 201510283226 A CN201510283226 A CN 201510283226A CN 104878780 A CN104878780 A CN 104878780A
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Abstract
The invention relates to a timed desilting silt prevention system during flattening of an immersed tunnel foundation bed. The timed desilting silt prevention system during flattening of the immersed tunnel foundation bed comprises lifting cables connected onto a vessel body, wherein the lifting cables are used for lifting a desilting device, and the desilting device comprises silt washing device and a silt sucking device. The desilting device comprises longitudinal silt washing pipes and longitudinal silt sucking pipes which are connected onto the vessel body, and transverse silt washing pipes and transverse silt sucking pipes which are in parallel with the foundation bed, wherein the transverse silt washing pipes and transverse silt sucking pipes are provided with a plurality of holes. In a timed desilting silt prevention method during flattening of the immersed tunnel foundation bed provided by the invention, after the flattening of the foundation bed is completed, the desilting device crossing over a foundation trench is lifted through a vessel to remove silt on the foundation bed, the silt washing device sprays water to the foundation bed to float the silt, then the silt sucking device sucks away the silt, repetitive desilting is realized and thereby the silt is prevented from being settled on the foundation bed. By adopting the timed desilting silt prevention scheme during flattening of the immersed tunnel foundation bed provided by the invention and performing timed desilting on the foundation bed, the silt is effectively prevented from being settled on the foundation bed.
Description
Technical field
The system and method used when the present invention relates to a kind of construction of seabed tunnel, the system and method that especially immersed tube tunnel bedding is anti-silting.
Background technology
Subaqueous tunnel often adopts immersed tunnelling method, whole tunnel immersed tube is made up of more piece tube coupling, the long 180m of general standard tube coupling, wide 37.95m, foundation for laid pipe is the rubble bedding of band furrow, rubble bedding width is 42 meters, the wide 1.05m of furrow, rubble bar bandwidth 1.8m, the bedding area of the accurate immersed tube of every feast-brand mark reaches that (42m × 180 are 7560 ㎡ m), rubble bedding from level to immersed tube install about 12 days of open-assembly time, because in the seawater in some marine sites, mean sediment concentration is higher, add foundation trench slope and push up the mud that there is about 2m in former mud face, change by sand content in flood season, near waterway dredging and adopt sand operation, bulk transport boats and ships are on impacts such as the disturbance of substrate and abnormal bad weathers, foundation ditch back silting can be caused to strengthen, even cause rapid silt.This gives Immersed tunnel and pipeline section itself is stressed brings many problems, and how to prevent and remove the deposit that back-silts is very crucial concerning immersed tube tunnel is basic.
Alluvial mainly contains the adverse effect that immersed tube tunnel causes: change rubble bedding mechanical characteristic, affect the power transmission effect of foundation bed structure; Depositing in bedding face, causes sinking tube coupling cannot implantation; To sedimental disturbance, change seawater unit weight, affect the anti-floating safety of immersed tube joint; If accompany mud in hardcore bed basis, then after tunnel operation, the excessive and differential settlement of immersed tube settlement after construction can be caused to exceed standard because of the consolidation deformation of mud, in pipeline section, produce larger moment of flexure, time serious, cause pipeline section to ftracture.Siltation makes the proportion of foundation trench depths water increase, and this can reduce the margin of safety of anti-floating power on Pipe Sinking position.
Summary of the invention
The technical problem to be solved in the present invention prevents bedding surface from back-silting anti-silting system after being to provide a kind of immersed tube tunnel bedding excavation, and construction method, make to install and to realize the completely isolated of mud and bedding before immersed tube, ensure that the integrality of bedding, ensure the appearance of foreign on bedding.
For solving the problems of the technologies described above, in immersed tube tunnel base bed flattening process of the present invention, timing desilting anti-silting system, comprises the hoist cable be connected on hull, and hoist cable is sling Accrete clearing device, and described Accrete clearing device comprises erosion and deposition device and inhales silt device.
Described Accrete clearing device comprises the longitudinal erosion and deposition pipe connecting hull, longitudinal silt-sucking tube, the horizontal erosion and deposition pipe being parallel to bedding and horizontal silt-sucking tube, and described horizontal erosion and deposition pipe and horizontal silt-sucking tube arrange multiple hole.
Described hoist cable is connected to hull two ends, longitudinal erosion and deposition pipe comprises front longitudinal erosion and deposition pipe and rear longitudinal erosion and deposition pipe, longitudinal silt-sucking tube comprises front longitudinal silt-sucking tube and rear longitudinal silt-sucking tube, described horizontal erosion and deposition pipe two ends connect the longitudinal erosion and deposition pipe in two, front and back respectively, and described horizontal silt-sucking tube two ends connect the longitudinal silt-sucking tube in two, front and back respectively.
Described horizontal erosion and deposition pipe or horizontal silt-sucking tube arrange measure and control device.
Timing desilting silt-proof method in immersed tube tunnel base bed flattening process of the present invention, after base bed flattening part completes, the Accrete clearing device sling across foundation trench by boats and ships carries out silt displacement to bedding, erosion and deposition device adopts and is floated by mud bedding water spray, then by inhaling silt device, mud is taken away, reciprocal desilting, prevents mud from depositing on bedding.
Adopt the anti-silting scheme of timing desilting in immersed tube tunnel base bed flattening process of the present invention, by the regular desilting of bedding, effectively prevent mud from depositing on bedding.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the structural representation of the anti-silting system of timing desilting in immersed tube tunnel base bed flattening process.
Fig. 2 is the elevation of the anti-silting system of timing desilting in immersed tube tunnel base bed flattening process.
Detailed description of the invention
The anti-silting system of timing desilting in immersed tube tunnel base bed flattening process of the present invention, comprise the hoist cable 2 be connected on hull 1, hoist cable 2 is sling Accrete clearing device, and hoist cable is connected to hull two ends, Accrete clearing device comprises front longitudinal erosion and deposition pipe 3, rear longitudinal erosion and deposition pipe 4, front longitudinal silt-sucking tube 5, rear longitudinally suction silt 6, horizontal erosion and deposition pipe 7, horizontal silt-sucking tube 8, horizontal erosion and deposition pipe 7 two ends connect the longitudinal erosion and deposition pipe in two, front and back respectively, and horizontal silt-sucking tube 8 two ends connect the longitudinal silt-sucking tube in two, front and back respectively.
Horizontal erosion and deposition pipe 7 or horizontal silt-sucking tube 8 arrange measure and control device 9.Horizontal erosion and deposition pipe 7 and horizontal silt-sucking tube 8 arrange multiple hole.
Timing desilting silt-proof method in immersed tube tunnel base bed flattening process of the present invention, after base bed flattening part completes, the Accrete clearing device sling across foundation trench by boats and ships carries out silt displacement to bedding, erosion and deposition device adopts and is floated by mud bedding water spray, then by inhaling silt device, mud is taken away, reciprocal desilting, prevents mud from depositing on bedding.
Claims (5)
1. a timing desilting anti-silting system in immersed tube tunnel base bed flattening process, is characterized in that: comprise the hoist cable be connected on hull, and hoist cable is sling Accrete clearing device, and described Accrete clearing device comprises erosion and deposition device and inhales silt device.
2. according to the anti-silting system of timing desilting in immersed tube tunnel base bed flattening process according to claim 1, it is characterized in that: described Accrete clearing device comprises the longitudinal erosion and deposition pipe connecting hull, longitudinal silt-sucking tube, the horizontal erosion and deposition pipe being parallel to bedding and horizontal silt-sucking tube, and described horizontal erosion and deposition pipe and horizontal silt-sucking tube arrange multiple hole.
3. according to the anti-silting system of timing desilting in the immersed tube tunnel base bed flattening process described in claim 1 or 2, it is characterized in that: described hoist cable is connected to hull two ends, longitudinal erosion and deposition pipe comprises front longitudinal erosion and deposition pipe and rear longitudinal erosion and deposition pipe, longitudinal silt-sucking tube comprises front longitudinal silt-sucking tube and rear longitudinal silt-sucking tube, described horizontal erosion and deposition pipe two ends connect the longitudinal erosion and deposition pipe in two, front and back respectively, and described horizontal silt-sucking tube two ends connect the longitudinal silt-sucking tube in two, front and back respectively.
4., according to the anti-silting system of timing desilting in immersed tube tunnel base bed flattening process according to claim 3, it is characterized in that: described horizontal erosion and deposition pipe or horizontal silt-sucking tube arrange measure and control device.
5. timing desilting silt-proof method in an immersed tube tunnel base bed flattening process, it is characterized in that: after base bed flattening part completes, the Accrete clearing device sling across foundation trench by boats and ships carries out silt displacement to bedding, erosion and deposition device adopts and is floated by mud bedding water spray, then by inhaling silt device, mud is taken away, reciprocal desilting, prevents mud from depositing on bedding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510283226.1A CN104878780A (en) | 2015-05-28 | 2015-05-28 | Timed desilting silt prevention system and method during flattening of immersed tunnel foundation bed |
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| CN201510283226.1A CN104878780A (en) | 2015-05-28 | 2015-05-28 | Timed desilting silt prevention system and method during flattening of immersed tunnel foundation bed |
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| CN201510283226.1A Pending CN104878780A (en) | 2015-05-28 | 2015-05-28 | Timed desilting silt prevention system and method during flattening of immersed tunnel foundation bed |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107630485A (en) * | 2017-11-10 | 2018-01-26 | 上海振华重工(集团)股份有限公司 | Deepwater Open Sea first spreads rubble bedding face desilting system and dredger |
| CN107816074A (en) * | 2017-12-11 | 2018-03-20 | 中国电建集团北京勘测设计研究院有限公司 | One kind diving flat push type desilting system and its dredging method |
| CN107882093A (en) * | 2017-12-11 | 2018-04-06 | 中国电建集团北京勘测设计研究院有限公司 | A kind of latent mud rolling suction desilting system and its dredging method |
| CN112253847A (en) * | 2020-10-17 | 2021-01-22 | 中石化石油工程技术服务有限公司 | Pipeline construction method for sand geological water network area |
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| CN85201611U (en) * | 1985-04-01 | 1986-12-17 | 上海水产学院 | Sludge-clearing machine able to work to and fro with a nonsealed mudpump and a submersible motor |
| CN87102680A (en) * | 1986-04-14 | 1987-10-28 | 雷耶尔·尼古拉斯·万·维曾比克 | Underwater sludge mobile device and using method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107630485A (en) * | 2017-11-10 | 2018-01-26 | 上海振华重工(集团)股份有限公司 | Deepwater Open Sea first spreads rubble bedding face desilting system and dredger |
| CN107630485B (en) * | 2017-11-10 | 2023-04-21 | 上海振华重工(集团)股份有限公司 | Open sea deep water is spread rubble foundation bed surface desilting system and desilting ship earlier |
| CN107816074A (en) * | 2017-12-11 | 2018-03-20 | 中国电建集团北京勘测设计研究院有限公司 | One kind diving flat push type desilting system and its dredging method |
| CN107882093A (en) * | 2017-12-11 | 2018-04-06 | 中国电建集团北京勘测设计研究院有限公司 | A kind of latent mud rolling suction desilting system and its dredging method |
| CN112253847A (en) * | 2020-10-17 | 2021-01-22 | 中石化石油工程技术服务有限公司 | Pipeline construction method for sand geological water network area |
| CN112253847B (en) * | 2020-10-17 | 2022-04-26 | 中石化石油工程技术服务有限公司 | Pipeline construction method for sand geological water network area |
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Application publication date: 20150902 |
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